Overview On October 28, 2025 , South Eastern Coalfields Limited (SECL) , a subsidiary of Coal India Limited (CIL) , released an India Post “Special Cover” to commemorate Coal India’s Golden Jubilee and SECL’s Ruby Jubilee (40 years) . This event recognizes their dedicated contribution to the nation’s energy sector. A Special Cancellation Cachet was also unveiled during the ceremony. Key Developments Release Ceremony The release ceremony was attended by key figures including Shri P. M. Prasad , Chairman of Coal India Limited , and Shri Harish Duhan , Chairman-cum-Managing Director of SECL , along with Functional Directors, the Chief Vigilance Officer, and Shri Dinesh Kumar Mistry (IPoS) DPS (HQ), C. G. Circle Raipur. India Post Special Cover The India Post Special Cover , issued in collaboration with the Department of Posts, Chhattisgarh Postal Circle , serves as a collectible philatelic item. It commemorates significant milestones in India’s industrial and institutional journey, paying tribute to Coal India’s five-decade legacy and SECL’s four decades of excellence in coal production. Special Campaign 5.0 This initiative was undertaken under the framework of Special Campaign 5.0 , a Government of India drive focused on institutional cleanliness, record management, and celebrating the achievements of public sector organizations. Background and Significance Coal India Limited's Contribution Since its inception in 1975 , Coal India Limited (CIL) has been a cornerstone of India’s energy security, meeting over 70% of the nation’s coal demand. As the world’s single-largest coal-producing company, CIL achieved its highest-ever coal production, dispatch, and overburden removal in its Golden Jubilee year, contributing to the historic milestone of 1 billion tonnes of coal production by the Indian coal sector in FY 2024-25 . SECL's Role SECL , one of Coal India’s largest subsidiaries, operates primarily in Chhattisgarh and Madhya Pradesh . Its Gevra Mine , the largest coal mine in Asia, exemplifies operational excellence and technological advancement. Beyond production, SECL is committed to sustainable mining, environmental protection, and social welfare, conducting extensive CSR initiatives in health, education, skill development, and ecological restoration. Impact and Legacy The Special Cover and Cachet reflect the shared legacy of Coal India and SECL , highlighting their focus on sustainability, responsibility, and nation-building while fueling India’s progress. UPSC Relevance GS Paper 3: Infrastructure and Resources This news is relevant to GS Paper 3 , specifically concerning infrastructure and resources. It highlights the role of Coal India Limited (CIL) and its subsidiaries in meeting India's energy needs. Understanding the contributions of PSUs like CIL and SECL is crucial for Mains answers on energy security and resource management. GS Paper 2: Government Policies and Interventions The Special Campaign 5.0 mentioned in the article is relevant to GS Paper 2 , as it reflects government policies aimed at improving the efficiency and accountability of public sector organizations. Important Facts for Prelims Coal India Limited (CIL) was established in 1975 . CIL meets over 70% of India’s coal demand. SECL’s Gevra Mine is the largest coal mine in Asia. The Indian coal sector achieved 1 billion tonnes of coal production in FY 2024-25 . SECL operates primarily in Chhattisgarh and Madhya Pradesh .